package com.wanboedu.handler;

import com.mysql.cj.jdbc.exceptions.MysqlDataTruncation;
import com.wanboedu.constant.MessageConstant;
import com.wanboedu.exception.BaseException;
import com.wanboedu.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;


import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex){
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }



    /**
     * 捕获SQL异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(SQLIntegrityConstraintViolationException ex){
            String message = ex.getMessage();
            if(message.contains("Duplicate entry")){
                String[] split = message.split(" ");
                String username = split[2];
                return Result.error(username + MessageConstant.ALREADY_EXISTS);
            }else {
                return Result.error(MessageConstant.UNKNOWN_ERROR);
            }
    }

    @ExceptionHandler
    public Result exceptionHandler(NullPointerException ex){
        String message = ex.getMessage();
        if(message.contains("Cannot invoke")){
            log.error("异常信息：{}",MessageConstant.ACCOUNT_NOT_FOUND);
        }
        return Result.error(MessageConstant.ACCOUNT_NOT_FOUND);
    }

    @ExceptionHandler
    public Result exceptionHandler(MysqlDataTruncation ex){
        String message = ex.getMessage();
        if(message.contains("Cannot invoke")){
            log.error("异常信息：{}",MessageConstant.DATA_LACK);
        }
        return Result.error(MessageConstant.DATA_LACK);
    }
}
